12. Using the equation below, what is the mole ratio _:_ of water (H20) to ammonia (NH3)? BazN2 + 6H2O → 3Ba(OH)2
3Ba(OH)2 + 2NH3

A. 1:2
B. 2:6
C. 6:2
D. 6:3

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures

[01.07]what is the answer to the problem: 101 g + 25.01 g + 5.05 g? 131.06 g 131.1 g 131 g 130 g